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CVE-2026-58088 (GCVE-0-2026-58088)

Vulnerability from nvd – Published: 2026-08-19 07:52 – Updated: 2026-08-20 03:55

Title

Race condition in ELF core dump segment counting

Summary

The ELF core dump code counted the number of dumpable VM map entries, allocated a buffer for the corresponding program headers, then iterated over the map a second time to populate them. A process sharing the address space via rfork(2) can mutate the map between the two passes, causing the second pass to write program headers past the end of the buffer. An unprivileged local user sharing an address space with a process that dumps core can trigger an out-of-bounds write on the kernel heap, potentially leading to privilege escalation.

Severity

7.4 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 00:00 UTC

CWE

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-787 - Out-of-bounds Write

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p2 (release) Affected: 15.0-RELEASE , < p12 (release) Affected: 14.4-RELEASE , < p8 (release)

Date Public

2026-07-29 22:40

Credits

Maik Muench of Secfault Security

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.4,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-58088",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-19T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-20T03:55:42.675Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "elf"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p2",
              "status": "affected",
              "version": "15.1-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p12",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p8",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Maik Muench of Secfault Security"
        }
      ],
      "datePublic": "2026-07-29T22:40:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The ELF core dump code counted the number of dumpable VM map entries, allocated a buffer for the corresponding program headers, then iterated over the map a second time to populate them.  A process sharing the address space via rfork(2) can mutate the map between the two passes, causing the second pass to write program headers past the end of the buffer.\n\nAn unprivileged local user sharing an address space with a process that dumps core can trigger an out-of-bounds write on the kernel heap, potentially leading to privilege escalation."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-362",
              "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-787",
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:52:13.411Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:55.elf.asc"
        }
      ],
      "title": "Race condition in ELF core dump segment counting",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-58088",
    "datePublished": "2026-08-19T07:52:13.411Z",
    "dateReserved": "2026-06-29T01:40:17.498Z",
    "dateUpdated": "2026-08-20T03:55:42.675Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-58087 (GCVE-0-2026-58087)

Vulnerability from nvd – Published: 2026-08-19 07:47 – Updated: 2026-08-20 03:55

Title

Heap out-of-bounds access in semctl(2)

Summary

The GETALL and SETALL commands in semctl(2) recorded the number of semaphores in the target set, dropped the lock protecting the set, allocated a buffer sized for that count, and reacquired the lock. A sequence-number check was used to verify that the set had not been replaced in the interim, but the sequence number wraps after 0x8000 create/destroy cycles. By rapidly destroying and recreating semaphore sets at the same index, another process can cause the sequence number to wrap, allowing a set with a different number of semaphores to pass validation. The subsequent copy then reads or writes past the end of the allocated buffer. An unprivileged local user can trigger out-of-bounds reads and writes on kernel heap memory, potentially leading to privilege escalation.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 00:00 UTC

CWE

CWE-191 - Integer Underflow (Wrap or Wraparound)
CWE-125 - Out-of-bounds Read
CWE-787 - Out-of-bounds Write

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p2 (release) Affected: 15.0-RELEASE , < p12 (release) Affected: 14.4-RELEASE , < p8 (release)

Date Public

2026-07-29 22:40

Credits

Maik Muench of Secfault Security

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "REQUIRED",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-58087",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-19T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-20T03:55:43.754Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "sysvsem"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p2",
              "status": "affected",
              "version": "15.1-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p12",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p8",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Maik Muench of Secfault Security"
        }
      ],
      "datePublic": "2026-07-29T22:40:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The GETALL and SETALL commands in semctl(2) recorded the number of semaphores in the target set, dropped the lock protecting the set, allocated a buffer sized for that count, and reacquired the lock.  A sequence-number check was used to verify that the set had not been replaced in the interim, but the sequence number wraps after 0x8000 create/destroy cycles.  By rapidly destroying and recreating semaphore sets at the same index, another process can cause the sequence number to wrap, allowing a set with a different number of semaphores to pass validation.  The subsequent copy then reads or writes past the end of the allocated buffer.\n\nAn unprivileged local user can trigger out-of-bounds reads and writes on kernel heap memory, potentially leading to privilege escalation."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-191",
              "description": "CWE-191: Integer Underflow (Wrap or Wraparound)",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-787",
              "description": "CWE-787: Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:47:50.665Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:54.sysvsem.asc"
        }
      ],
      "title": "Heap out-of-bounds access in semctl(2)",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-58087",
    "datePublished": "2026-08-19T07:47:50.665Z",
    "dateReserved": "2026-06-29T01:40:17.498Z",
    "dateUpdated": "2026-08-20T03:55:43.754Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-58086 (GCVE-0-2026-58086)

Vulnerability from nvd – Published: 2026-08-19 07:42 – Updated: 2026-08-19 07:42

Title

ktrace(2) privilege incorrectly validated in jails

Summary

As an inadvertent side effect of an unrelated code change, PRIV_KTRACE was always denied to a jailed root user. Tracing configured by a jailed root user was therefore not flagged as privileged. An unprivileged user in a jail that has permission to debug the target process can modify the jailed root user's ktrace(2) flags, or disable tracing outright. A jailed root user therefore cannot reliably trace unprivileged processes.

Severity

No CVSS data available.

CWE

CWE-273 - Improper Check for Dropped Privileges

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p2 (release) Affected: 15.0-RELEASE , < p12 (release)

Date Public

2026-07-29 22:40

Credits

Alexander Leidinger

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "ktrace"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p2",
              "status": "affected",
              "version": "15.1-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p12",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Alexander Leidinger"
        }
      ],
      "datePublic": "2026-07-29T22:40:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "As an inadvertent side effect of an unrelated code change, PRIV_KTRACE was always denied to a jailed root user.  Tracing configured by a jailed root user was therefore not flagged as privileged.\n\nAn unprivileged user in a jail that has permission to debug the target process can modify the jailed root user\u0027s ktrace(2) flags, or disable tracing outright.  A jailed root user therefore cannot reliably trace unprivileged processes."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-273",
              "description": "CWE-273: Improper Check for Dropped Privileges",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:42:10.902Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:53.ktrace.asc"
        }
      ],
      "title": "ktrace(2) privilege incorrectly validated in jails",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-58086",
    "datePublished": "2026-08-19T07:42:10.902Z",
    "dateReserved": "2026-06-29T01:40:17.498Z",
    "dateUpdated": "2026-08-19T07:42:10.902Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-58085 (GCVE-0-2026-58085)

Vulnerability from nvd – Published: 2026-08-19 07:38 – Updated: 2026-08-19 07:38

Title

Missing MAC validation in wg(4) packet decryption

Summary

After dispatching a decrypt operation to OCF and receiving the result, the wg(4) driver failed to check whether the MAC verification step succeeded. The driver thus silently accepted packets with an invalid Poly1305 authentication tag. A remote attacker who can send UDP packets to a WireGuard endpoint, and who can guess the bounds of the receiver's replay window, can inject forged or modified transport data packets into the tunnel. A remote attacker who can intercept WireGuard packets bound for a FreeBSD host can modify the ciphertext and authenticated data without detection by the receiver.

Severity

No CVSS data available.

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p2 (release) Affected: 15.0-RELEASE , < p12 (release) Affected: 14.4-RELEASE , < p8 (release)

Date Public

2026-07-29 22:40

Credits

Reo Shiseki

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "if_wg"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p2",
              "status": "affected",
              "version": "15.1-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p12",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p8",
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              "version": "14.4-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Reo Shiseki"
        }
      ],
      "datePublic": "2026-07-29T22:40:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "After dispatching a decrypt operation to OCF and receiving the result, the wg(4) driver failed to check whether the MAC verification step succeeded.  The driver thus silently accepted packets with an invalid Poly1305 authentication tag.\n\nA remote attacker who can send UDP packets to a WireGuard endpoint, and who can guess the bounds of the receiver\u0027s replay window, can inject forged or modified transport data packets into the tunnel.\n\nA remote attacker who can intercept WireGuard packets bound for a FreeBSD host can modify the ciphertext and authenticated data without detection by the receiver."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "CWE-347: Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:38:50.551Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:52.if_wg.asc"
        }
      ],
      "title": "Missing MAC validation in wg(4) packet decryption",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
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    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-58085",
    "datePublished": "2026-08-19T07:38:50.551Z",
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    "dateUpdated": "2026-08-19T07:38:50.551Z",
    "state": "PUBLISHED"
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}

CVE-2026-58084 (GCVE-0-2026-58084)

Vulnerability from nvd – Published: 2026-08-19 07:31 – Updated: 2026-08-19 07:31

Title

Kernel stack disclosure via timer_settime(2)

Summary

To retrieve the previous timer value, the kernel calls realtimer_gettime(), which obtains the current time for the timer's clock. For a timer using CLOCK_TAI this can fail when no TAI offset has been configured, but the error return was not checked, so the uninitialized output buffer was copied to userspace. An unprivileged local user can obtain uninitialized kernel stack memory by creating a POSIX timer with CLOCK_TAI and calling timer_settime(2), potentially disclosing sensitive kernel data.

Severity

No CVSS data available.

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p2 (release) Affected: 15.0-RELEASE , < p12 (release)

Date Public

2026-07-29 22:40

Credits

Hazley Samsudin of GovTech CSG

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "ktimer"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p2",
              "status": "affected",
              "version": "15.1-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p12",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Hazley Samsudin of GovTech CSG"
        }
      ],
      "datePublic": "2026-07-29T22:40:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "To retrieve the previous timer value, the kernel calls realtimer_gettime(), which obtains the current time for the timer\u0027s clock.  For a timer using CLOCK_TAI this can fail when no TAI offset has been configured, but the error return was not checked, so the uninitialized output buffer was copied to userspace.\n\nAn unprivileged local user can obtain uninitialized kernel stack memory by creating a POSIX timer with CLOCK_TAI and calling timer_settime(2), potentially disclosing sensitive kernel data."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-908",
              "description": "CWE-908: Use of Uninitialized Resource",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:31:42.001Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:51.ktimer.asc"
        }
      ],
      "title": "Kernel stack disclosure via timer_settime(2)",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-58084",
    "datePublished": "2026-08-19T07:31:42.001Z",
    "dateReserved": "2026-06-29T01:40:17.498Z",
    "dateUpdated": "2026-08-19T07:31:42.001Z",
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}

CVE-2026-58083 (GCVE-0-2026-58083)

Vulnerability from nvd – Published: 2026-08-19 07:28 – Updated: 2026-08-20 03:55

Title

Use-after-free in kqueue copy-on-fork

Summary

While the kernel was copying knotes during fork, a knote with a timer-based filter could fire and be enqueued on the kqueue's active list before the copy was complete. The copy routine did not account for this and could enqueue the new knote a second time, corrupting the active list. In addition, the copy routine did not hold the appropriate locks while reading knote state, allowing further races. An unprivileged local user can trigger a use-after-free in the kernel, potentially leading to privilege escalation.

Severity

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 00:00 UTC

CWE

CWE-416 - Use After Free

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p2 (release)

Date Public

2026-07-29 22:40

Credits

Hazley Samsudin of GovTech CSG

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 8.4,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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                "options": [
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                  },
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                  },
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                  }
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
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          "type": "finder",
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          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:50.kqueue.asc"
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}

CVE-2026-58082 (GCVE-0-2026-58082)

Vulnerability from nvd – Published: 2026-08-19 07:20 – Updated: 2026-08-19 07:20

Title

Stack based buffer overflow in iconv(3)

Summary

The ISO-2022 encoding module used a stack buffer sized to MB_LEN_MAX (6 bytes) for intermediate character output. Some ISO-2022 variants can require up to 10 bytes per character, in which case conversions can trigger a stack buffer overflow of up to four bytes. An application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules.

Severity

No CVSS data available.

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Nick Wellnhofer Mark Johnston

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "iconv"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
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              "status": "affected",
              "version": "15.1-RELEASE",
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            },
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              "status": "affected",
              "version": "15.0-RELEASE",
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            },
            {
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              "version": "14.4-RELEASE",
              "versionType": "release"
            },
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              "version": "14.3-RELEASE",
              "versionType": "release"
            }
          ]
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      ],
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        {
          "lang": "en",
          "type": "finder",
          "value": "Nick Wellnhofer"
        },
        {
          "lang": "en",
          "type": "finder",
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        }
      ],
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        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-121",
              "description": "CWE-121: Stack-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
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      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:20:37.172Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
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      },
      "references": [
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          ],
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}

CVE-2026-58081 (GCVE-0-2026-58081)

Vulnerability from nvd – Published: 2026-08-19 07:20 – Updated: 2026-08-19 07:20

Title

Heap based buffer overflow in iconv(3)

Summary

Several encoding modules, including HZ, UTF-7, VIQR, and ZW, did not properly check the size of the caller-supplied output buffer before writing converted characters. An application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules.

Severity

No CVSS data available.

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Nick Wellnhofer Mark Johnston

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "iconv"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
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              "status": "affected",
              "version": "15.1-RELEASE",
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            {
              "lessThan": "p11",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p7",
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              "version": "14.4-RELEASE",
              "versionType": "release"
            },
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              "version": "14.3-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Nick Wellnhofer"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Mark Johnston"
        }
      ],
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        {
          "lang": "en",
          "value": "Several encoding modules, including HZ, UTF-7, VIQR, and ZW, did not properly check the size of the caller-supplied output buffer before writing converted characters.\n\nAn application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:20:26.880Z",
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      },
      "references": [
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          "tags": [
            "vendor-advisory"
          ],
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      ],
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}

CVE-2026-49425 (GCVE-0-2026-49425)

Vulnerability from nvd – Published: 2026-08-19 07:11 – Updated: 2026-08-19 07:11

Title

Kernel stack disclosure in 32-bit compatibility support

Summary

The compat32 kevent() handler translates a 64-bit kevent struct into a stack- declared 32-bit struct. It did not first zero the stack struct. An unprivileged user may observe a small amount of uninitialized kernel stack data, which may contain sensitive information.

Severity

No CVSS data available.

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Adam Crosser, Praetorian

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "compat32"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
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              "lessThan": "p11",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p7",
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              "version": "14.4-RELEASE",
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            {
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      ],
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      ],
      "datePublic": "2026-06-30T20:00:00.000Z",
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          "lang": "en",
          "value": "The compat32 kevent() handler translates a 64-bit kevent struct into a stack- declared 32-bit struct.  It did not first zero the stack struct.\n\nAn unprivileged user may observe a small amount of uninitialized kernel stack data, which may contain sensitive information."
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:11:21.113Z",
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      },
      "references": [
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          "tags": [
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      ],
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CVE-2026-49424 (GCVE-0-2026-49424)

Vulnerability from nvd – Published: 2026-08-19 07:08 – Updated: 2026-08-19 07:08

Title

Kernel stack disclosure in Linux compatibility layer

Summary

The Linux waitid() implementation translates a FreeBSD siginfo_t struct into a stack-declared Linux siginfo_t. It did not first zero the stack struct. An unprivileged user may observe 104 bytes of uninitialized kernel stack data, which may contain sensitive information.

Severity

No CVSS data available.

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Adam Crosser, Praetorian

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "linux"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p11",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
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      ],
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        }
      ],
      "datePublic": "2026-06-30T20:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The Linux waitid() implementation translates a FreeBSD siginfo_t struct into a stack-declared Linux siginfo_t.  It did not first zero the stack struct.\n\nAn unprivileged user may observe 104 bytes of uninitialized kernel stack data, which may contain sensitive information."
        }
      ],
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:08:35.691Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
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      },
      "references": [
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          "tags": [
            "vendor-advisory"
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          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:47.linux.asc"
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      ],
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}

CVE-2026-49423 (GCVE-0-2026-49423)

Vulnerability from nvd – Published: 2026-08-19 07:01 – Updated: 2026-08-19 07:01

Title

Remote DOS via uninitialized memory access in KTLS receive

Summary

When building the iovec array for a received TLS 1.2 CBC record, ktls_ocf_tls_cbc_decrypt() incremented the iovec index for every mbuf in the chain, including mbufs that were skipped because they contained only TLS header bytes. This left uninitialized entries in the iovec array. The iovec array was allocated without zeroing. A remote TLS peer can cause the kernel to read from uninitialized iovec entries during HMAC computation, resulting in a kernel panic. The peer must be able to control TCP segmentation such that the first mbuf of a CBC record contains only the 5-byte TLS record header.

Severity

No CVSS data available.

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Yuxiang Yang, Yizhou Zhao, Ao Wang, Xuewei Feng, Qi Li, and Ke Xu from Tsinghua University using GLM-5.1 from Z.ai

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "ktls"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p1",
              "status": "affected",
              "version": "15.1-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p11",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p7",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p16",
              "status": "affected",
              "version": "14.3-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Yuxiang Yang, Yizhou Zhao, Ao Wang, Xuewei Feng, Qi Li, and Ke Xu from Tsinghua University using GLM-5.1 from Z.ai"
        }
      ],
      "datePublic": "2026-06-30T20:00:00.000Z",
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          "lang": "en",
          "value": "When building the iovec array for a received TLS 1.2 CBC record, ktls_ocf_tls_cbc_decrypt() incremented the iovec index for every mbuf in the chain, including mbufs that were skipped because they contained only TLS header bytes.  This left uninitialized entries in the iovec array.  The iovec array was allocated without zeroing.\n\nA remote TLS peer can cause the kernel to read from uninitialized iovec entries during HMAC computation, resulting in a kernel panic.  The peer must be able to control TCP segmentation such that the first mbuf of a CBC record contains only the 5-byte TLS record header."
        }
      ],
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              "cweId": "CWE-908",
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CVE-2026-49431 (GCVE-0-2026-49431)

Vulnerability from nvd – Published: 2026-08-19 05:15 – Updated: 2026-08-19 05:15

Title

Incorrect user validation in ZFS_IOC_SET_PROP ioctl

Summary

The ZFS_IOC_SET_PROP ioctl, used by zfs-set(8), incorrectly validated the calling user such that an unprivileged user is able to set metadata on a dataset indicating that the dataset has received properties from a zfs-recv(8) stream. Any local user can set the internal ZFS metadata flag "$hasrecvd" on datasets via ZFS_IOC_SET_PROP.

Severity

No CVSS data available.

CWE

CWE-863 - Incorrect Authorization

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Yuxiang Yang, Yizhou Zhao, Ao Wang, Xuewei Feng, Qi Li, and Ke Xu from Tsinghua University using GLM-5.1 from Z.ai Emmanuel Genier at Quarkslab

Show details on NVD website

JSON

To clipboard

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CVE-2026-49430 (GCVE-0-2026-49430)

Vulnerability from nvd – Published: 2026-08-19 05:15 – Updated: 2026-08-19 05:15

Title

Kernel heap overflow in ZFS_IOC_RECV_NEW ioctl

Summary

The ZFS_IOC_RECV_NEW ioctl, in the heal receive path, similarly truncated a 64-bit payload size to a 32-bit integer for allocation, then used the original 64-bit size as the length for a byteswap operation. A local user with the "receive" delegated ZFS permission can trigger kernel memory corruption via ZFS_IOC_RECV_NEW by sending a crafted receive stream in heal mode.

Severity

No CVSS data available.

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Yuxiang Yang, Yizhou Zhao, Ao Wang, Xuewei Feng, Qi Li, and Ke Xu from Tsinghua University using GLM-5.1 from Z.ai Emmanuel Genier at Quarkslab

Show details on NVD website

JSON

To clipboard

{
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          "modules": [
            "zfs"
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        }
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CVE-2026-49429 (GCVE-0-2026-49429)

Vulnerability from nvd – Published: 2026-08-19 05:15 – Updated: 2026-08-20 03:55

Title

Kernel heap overflow in ZFS_IOC_USERSPACE_MANY ioctl

Summary

The ZFS_IOC_USERSPACE_MANY ioctl, used by zfs-userspace(8), truncated a 64-bit output buffer size to a 32-bit integer for the kernel allocation, but used the original 64-bit size as the buffer limit when writing records. A local user with the "userused" delegated ZFS permission can trigger a kernel heap overflow via the ZFS_IOC_USERSPACE_MANY ioctl, potentially escalating privileges.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 00:00 UTC

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Yuxiang Yang, Yizhou Zhao, Ao Wang, Xuewei Feng, Qi Li, and Ke Xu from Tsinghua University using GLM-5.1 from Z.ai Emmanuel Genier at Quarkslab

Show details on NVD website

JSON

To clipboard

{
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CVE-2026-49428 (GCVE-0-2026-49428)

Vulnerability from nvd – Published: 2026-08-19 05:57 – Updated: 2026-08-20 03:55

Title

posixshm: system calls can incorrectly free memory of largepage objects

Summary

Certain system calls, such open(2) with the O_TRUNC flag set, and fspacectl(2), could incorrectly free memory in largepage objects. These operations are not permitted on largepage objects, but the implementation did not verify this. An unprivileged local user can abuse the bug to access freed kernel memory. This can be exploited to escalate privileges.

Severity

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 00:00 UTC

CWE

CWE-915 - Improperly Controlled Modification of Dynamically-Determined Object Attributes

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Chris Jarrett-Davies of the OpenAI Codex Security Team

Show details on NVD website

JSON

To clipboard

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CVE-2026-49427 (GCVE-0-2026-49427)

Vulnerability from nvd – Published: 2026-08-19 05:56 – Updated: 2026-08-20 18:35

Title

posixshm: largepage shared memory objects not explicitly wired

Summary

Pages belonging to largepage shared memory objects were not explicitly wired. When sendfile(2) transmitted such an object with the SF_NOCACHE flag, it freed the underlying pages after transmission even though existing mappings still referred to them. An unprivileged local user can abuse the bug to access freed kernel memory. This can be exploited to escalate privileges.

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 03:56 UTC

CWE

CWE-826 - Premature Release of Resource During Expected Lifetime

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Chris Jarrett-Davies of the OpenAI Codex Security Team

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-49427",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-20T03:56:01.222360Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-20T18:35:54.694Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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          "defaultStatus": "unknown",
          "modules": [
            "posixshm"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
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              "status": "affected",
              "version": "15.1-RELEASE",
              "versionType": "release"
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              "version": "15.0-RELEASE",
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            }
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        }
      ],
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          "lang": "en",
          "type": "finder",
          "value": "Chris Jarrett-Davies of the OpenAI Codex Security Team"
        }
      ],
      "datePublic": "2026-06-30T20:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Pages belonging to largepage shared memory objects were not explicitly wired.  When sendfile(2) transmitted such an object with the SF_NOCACHE flag, it freed the underlying pages after transmission even though existing mappings still referred to them.\n\nAn unprivileged local user can abuse the bug to access freed kernel memory.  This can be exploited to escalate privileges."
        }
      ],
      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-826",
              "description": "CWE-826: Premature Release of Resource During Expected Lifetime",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
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        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:44.posixshm.asc"
        }
      ],
      "title": "posixshm: largepage shared memory objects not explicitly wired",
      "x_generator": {
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      }
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  "cveMetadata": {
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}

CVE-2026-49426 (GCVE-0-2026-49426)

Vulnerability from nvd – Published: 2026-08-19 06:04 – Updated: 2026-08-19 06:04

Title

Incorrect audit records for ptrace(2) syscall requests

Summary

When auditing a system call executed via ptrace(PT_SC_REMOTE), the kernel passed the return value of an internal setup function to AUDIT_SYSCALL_EXIT() rather than the actual result of the executed system call. As a result, committed audit records for system calls which returned an error do not reflect the true outcome of the operation. That is, they indicate that the operation succeeded when it in fact failed. Audit records for system calls executed via ptrace(PT_SC_REMOTE) may show an incorrect error status. An attacker with the ability to debug a process could use this to produce misleading audit trails, potentially undermining audit-based Intrusion Detection Systems (IDS).

Severity

No CVSS data available.

CWE

CWE-223 - Omission of Security-relevant Information
CWE-224 - Obscured Security-relevant Information by Alternate Name

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Kyle Evans

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "audit"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p1",
              "status": "affected",
              "version": "15.1-RELEASE",
              "versionType": "release"
            },
            {
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              "status": "affected",
              "version": "15.0-RELEASE",
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              "version": "14.3-RELEASE",
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            }
          ]
        }
      ],
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        {
          "lang": "en",
          "type": "finder",
          "value": "Kyle Evans"
        }
      ],
      "datePublic": "2026-06-30T20:00:00.000Z",
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        {
          "lang": "en",
          "value": "When auditing a system call executed via ptrace(PT_SC_REMOTE), the kernel passed the return value of an internal setup function to AUDIT_SYSCALL_EXIT() rather than the actual result of the executed system call.  As a result, committed audit records for system calls which returned an error do not reflect the true outcome of the operation.  That is, they indicate that the operation succeeded when it in fact failed.\n\nAudit records for system calls executed via ptrace(PT_SC_REMOTE) may show an incorrect error status.  An attacker with the ability to debug a process could use this to produce misleading audit trails, potentially undermining audit-based Intrusion Detection Systems (IDS)."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-223",
              "description": "CWE-223: Omission of Security-relevant Information",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-224",
              "description": "CWE-224: Obscured Security-relevant Information by Alternate Name",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T06:04:36.581Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:45.audit.asc"
        }
      ],
      "title": "Incorrect audit records for ptrace(2) syscall requests",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
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    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-49426",
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    "dateReserved": "2026-05-29T20:24:28.616Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-49422 (GCVE-0-2026-49422)

Vulnerability from nvd – Published: 2026-08-19 05:28 – Updated: 2026-08-20 03:55

Title

Use-after-free in TCP RACK stack option handler

Summary

The RACK setsockopt(2) handler drops the connection lock in order to copy option data from userspace, then reacquires the lock. After reacquiring, it verifies that the TCP stack had not been switched away, but did not reload its pointer to the stack's per-connection control block. If userspace switches stacks twice during this window, the check will succeed but the saved pointer will refer to freed memory. The bug may be exploitable by an unprivileged local user to escalate privileges.

Severity

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 00:00 UTC

CWE

CWE-416 - Use After Free

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Maik Muench

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 8.4,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-49422",
                "options": [
                  {
                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
                  },
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                    "Technical Impact": "total"
                  }
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                "timestamp": "2026-08-19T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-20T03:55:47.007Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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          "defaultStatus": "unknown",
          "modules": [
            "tcp"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
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            {
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          "type": "finder",
          "value": "Maik Muench"
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          "lang": "en",
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        }
      ],
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          "descriptions": [
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              "lang": "en",
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}

CVE-2026-49421 (GCVE-0-2026-49421)

Vulnerability from nvd – Published: 2026-08-19 05:25 – Updated: 2026-08-19 05:25

Title

unlinkat(2) ignores AT_RESOLVE_BENEATH flag

Summary

The kernel function that implements unlinkat(2) and funlinkat(2) validated the AT_RESOLVE_BENEATH flag but failed to pass it through to the underlying path lookup. The flag was silently dropped, so path resolution was not actually restricted. A process that uses AT_RESOLVE_BENEATH with unlinkat(2) or funlinkat(2) to confine path resolution can in fact resolve paths above the starting directory. A caller relying on this flag for path containment may delete files outside the intended directory tree.

Severity

No CVSS data available.

CWE

CWE-273 - Improper Check for Dropped Privileges

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Yuxiang Yang, Yizhou Zhao, Ao Wang, Xuewei Feng, Qi Li, and Ke Xu from Tsinghua University using GLM-5.1 from Z.ai

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "libalias"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p1",
              "status": "affected",
              "version": "15.1-RELEASE",
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              "version": "15.0-RELEASE",
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        }
      ],
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        {
          "lang": "en",
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        }
      ],
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        {
          "descriptions": [
            {
              "cweId": "CWE-273",
              "description": "CWE-273: Improper Check for Dropped Privileges",
              "lang": "en",
              "type": "CWE"
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          ]
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      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:42.unlinkat.asc"
        }
      ],
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        "engine": "cvelib 1.8.0"
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    }
  },
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}

CVE-2026-58088 (GCVE-0-2026-58088)

Vulnerability from cvelistv5 – Published: 2026-08-19 07:52 – Updated: 2026-08-20 03:55

Title

Race condition in ELF core dump segment counting

Summary

The ELF core dump code counted the number of dumpable VM map entries, allocated a buffer for the corresponding program headers, then iterated over the map a second time to populate them. A process sharing the address space via rfork(2) can mutate the map between the two passes, causing the second pass to write program headers past the end of the buffer. An unprivileged local user sharing an address space with a process that dumps core can trigger an out-of-bounds write on the kernel heap, potentially leading to privilege escalation.

Severity

7.4 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 00:00 UTC

CWE

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-787 - Out-of-bounds Write

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p2 (release) Affected: 15.0-RELEASE , < p12 (release) Affected: 14.4-RELEASE , < p8 (release)

Date Public

2026-07-29 22:40

Credits

Maik Muench of Secfault Security

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "LOCAL",
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              "confidentialityImpact": "HIGH",
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              "scope": "UNCHANGED",
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          }
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        "providerMetadata": {
          "dateUpdated": "2026-08-20T03:55:42.675Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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        {
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          "modules": [
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          ],
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          "vendor": "FreeBSD",
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              "status": "affected",
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        {
          "lang": "en",
          "value": "The ELF core dump code counted the number of dumpable VM map entries, allocated a buffer for the corresponding program headers, then iterated over the map a second time to populate them.  A process sharing the address space via rfork(2) can mutate the map between the two passes, causing the second pass to write program headers past the end of the buffer.\n\nAn unprivileged local user sharing an address space with a process that dumps core can trigger an out-of-bounds write on the kernel heap, potentially leading to privilege escalation."
        }
      ],
      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-362",
              "description": "CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
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              "type": "CWE"
            },
            {
              "cweId": "CWE-787",
              "description": "CWE-787: Out-of-bounds Write",
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          "tags": [
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CVE-2026-58087 (GCVE-0-2026-58087)

Vulnerability from cvelistv5 – Published: 2026-08-19 07:47 – Updated: 2026-08-20 03:55

Title

Heap out-of-bounds access in semctl(2)

Summary

The GETALL and SETALL commands in semctl(2) recorded the number of semaphores in the target set, dropped the lock protecting the set, allocated a buffer sized for that count, and reacquired the lock. A sequence-number check was used to verify that the set had not been replaced in the interim, but the sequence number wraps after 0x8000 create/destroy cycles. By rapidly destroying and recreating semaphore sets at the same index, another process can cause the sequence number to wrap, allowing a set with a different number of semaphores to pass validation. The subsequent copy then reads or writes past the end of the allocated buffer. An unprivileged local user can trigger out-of-bounds reads and writes on kernel heap memory, potentially leading to privilege escalation.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 00:00 UTC

CWE

CWE-191 - Integer Underflow (Wrap or Wraparound)
CWE-125 - Out-of-bounds Read
CWE-787 - Out-of-bounds Write

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p2 (release) Affected: 15.0-RELEASE , < p12 (release) Affected: 14.4-RELEASE , < p8 (release)

Date Public

2026-07-29 22:40

Credits

Maik Muench of Secfault Security

Show details on NVD website

JSON

To clipboard

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CVE-2026-58086 (GCVE-0-2026-58086)

Vulnerability from cvelistv5 – Published: 2026-08-19 07:42 – Updated: 2026-08-19 07:42

Title

ktrace(2) privilege incorrectly validated in jails

Summary

As an inadvertent side effect of an unrelated code change, PRIV_KTRACE was always denied to a jailed root user. Tracing configured by a jailed root user was therefore not flagged as privileged. An unprivileged user in a jail that has permission to debug the target process can modify the jailed root user's ktrace(2) flags, or disable tracing outright. A jailed root user therefore cannot reliably trace unprivileged processes.

Severity

No CVSS data available.

CWE

CWE-273 - Improper Check for Dropped Privileges

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p2 (release) Affected: 15.0-RELEASE , < p12 (release)

Date Public

2026-07-29 22:40

Credits

Alexander Leidinger

Show details on NVD website

JSON

To clipboard

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            "ktrace"
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CVE-2026-58085 (GCVE-0-2026-58085)

Vulnerability from cvelistv5 – Published: 2026-08-19 07:38 – Updated: 2026-08-19 07:38

Title

Missing MAC validation in wg(4) packet decryption

Summary

After dispatching a decrypt operation to OCF and receiving the result, the wg(4) driver failed to check whether the MAC verification step succeeded. The driver thus silently accepted packets with an invalid Poly1305 authentication tag. A remote attacker who can send UDP packets to a WireGuard endpoint, and who can guess the bounds of the receiver's replay window, can inject forged or modified transport data packets into the tunnel. A remote attacker who can intercept WireGuard packets bound for a FreeBSD host can modify the ciphertext and authenticated data without detection by the receiver.

Severity

No CVSS data available.

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p2 (release) Affected: 15.0-RELEASE , < p12 (release) Affected: 14.4-RELEASE , < p8 (release)

Date Public

2026-07-29 22:40

Credits

Reo Shiseki

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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        {
          "defaultStatus": "unknown",
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CVE-2026-58084 (GCVE-0-2026-58084)

Vulnerability from cvelistv5 – Published: 2026-08-19 07:31 – Updated: 2026-08-19 07:31

Title

Kernel stack disclosure via timer_settime(2)

Summary

To retrieve the previous timer value, the kernel calls realtimer_gettime(), which obtains the current time for the timer's clock. For a timer using CLOCK_TAI this can fail when no TAI offset has been configured, but the error return was not checked, so the uninitialized output buffer was copied to userspace. An unprivileged local user can obtain uninitialized kernel stack memory by creating a POSIX timer with CLOCK_TAI and calling timer_settime(2), potentially disclosing sensitive kernel data.

Severity

No CVSS data available.

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p2 (release) Affected: 15.0-RELEASE , < p12 (release)

Date Public

2026-07-29 22:40

Credits

Hazley Samsudin of GovTech CSG

Show details on NVD website

JSON

To clipboard

{
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        {
          "defaultStatus": "unknown",
          "modules": [
            "ktimer"
          ],
          "product": "FreeBSD",
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CVE-2026-58083 (GCVE-0-2026-58083)

Vulnerability from cvelistv5 – Published: 2026-08-19 07:28 – Updated: 2026-08-20 03:55

Title

Use-after-free in kqueue copy-on-fork

Summary

While the kernel was copying knotes during fork, a knote with a timer-based filter could fire and be enqueued on the kqueue's active list before the copy was complete. The copy routine did not account for this and could enqueue the new knote a second time, corrupting the active list. In addition, the copy routine did not hold the appropriate locks while reading knote state, allowing further races. An unprivileged local user can trigger a use-after-free in the kernel, potentially leading to privilege escalation.

Severity

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 00:00 UTC

CWE

CWE-416 - Use After Free

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p2 (release)

Date Public

2026-07-29 22:40

Credits

Hazley Samsudin of GovTech CSG

Show details on NVD website

JSON

To clipboard

{
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              "attackVector": "LOCAL",
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        {
          "lang": "en",
          "value": "While the kernel was copying knotes during fork, a knote with a timer-based filter could fire and be enqueued on the kqueue\u0027s active list before the copy was complete.  The copy routine did not account for this and could enqueue the new knote a second time, corrupting the active list.  In addition, the copy routine did not hold the appropriate locks while reading knote state, allowing further races.\n\nAn unprivileged local user can trigger a use-after-free in the kernel, potentially leading to privilege escalation."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-416",
              "description": "CWE-416: Use After Free",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:33:21.096Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:50.kqueue.asc"
        }
      ],
      "title": "Use-after-free in kqueue copy-on-fork",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-58083",
    "datePublished": "2026-08-19T07:28:28.502Z",
    "dateReserved": "2026-06-29T01:40:17.498Z",
    "dateUpdated": "2026-08-20T03:55:44.831Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-58082 (GCVE-0-2026-58082)

Vulnerability from cvelistv5 – Published: 2026-08-19 07:20 – Updated: 2026-08-19 07:20

Title

Stack based buffer overflow in iconv(3)

Summary

The ISO-2022 encoding module used a stack buffer sized to MB_LEN_MAX (6 bytes) for intermediate character output. Some ISO-2022 variants can require up to 10 bytes per character, in which case conversions can trigger a stack buffer overflow of up to four bytes. An application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules.

Severity

No CVSS data available.

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Nick Wellnhofer Mark Johnston

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "iconv"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p1",
              "status": "affected",
              "version": "15.1-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p11",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p7",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p16",
              "status": "affected",
              "version": "14.3-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Nick Wellnhofer"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Mark Johnston"
        }
      ],
      "datePublic": "2026-06-30T20:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The ISO-2022 encoding module used a stack buffer sized to MB_LEN_MAX (6 bytes) for intermediate character output.  Some ISO-2022 variants can require up to 10 bytes per character, in which case conversions can trigger a stack buffer overflow of up to four bytes.\n\nAn application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-121",
              "description": "CWE-121: Stack-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:20:37.172Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:49.iconv.asc"
        }
      ],
      "title": "Stack based buffer overflow in iconv(3)",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-58082",
    "datePublished": "2026-08-19T07:20:37.172Z",
    "dateReserved": "2026-06-29T01:40:17.498Z",
    "dateUpdated": "2026-08-19T07:20:37.172Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-58081 (GCVE-0-2026-58081)

Vulnerability from cvelistv5 – Published: 2026-08-19 07:20 – Updated: 2026-08-19 07:20

Title

Heap based buffer overflow in iconv(3)

Summary

Several encoding modules, including HZ, UTF-7, VIQR, and ZW, did not properly check the size of the caller-supplied output buffer before writing converted characters. An application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules.

Severity

No CVSS data available.

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Nick Wellnhofer Mark Johnston

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "iconv"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p1",
              "status": "affected",
              "version": "15.1-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p11",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p7",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p16",
              "status": "affected",
              "version": "14.3-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Nick Wellnhofer"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Mark Johnston"
        }
      ],
      "datePublic": "2026-06-30T20:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Several encoding modules, including HZ, UTF-7, VIQR, and ZW, did not properly check the size of the caller-supplied output buffer before writing converted characters.\n\nAn application that uses iconv(3) to convert untrusted input to or from one of the affected encodings may be vulnerable to buffer overflows if it uses one of the affected encoding modules."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:20:26.880Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:49.iconv.asc"
        }
      ],
      "title": "Heap based buffer overflow in iconv(3)",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-58081",
    "datePublished": "2026-08-19T07:20:26.880Z",
    "dateReserved": "2026-06-29T01:40:17.498Z",
    "dateUpdated": "2026-08-19T07:20:26.880Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-49425 (GCVE-0-2026-49425)

Vulnerability from cvelistv5 – Published: 2026-08-19 07:11 – Updated: 2026-08-19 07:11

Title

Kernel stack disclosure in 32-bit compatibility support

Summary

The compat32 kevent() handler translates a 64-bit kevent struct into a stack- declared 32-bit struct. It did not first zero the stack struct. An unprivileged user may observe a small amount of uninitialized kernel stack data, which may contain sensitive information.

Severity

No CVSS data available.

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Adam Crosser, Praetorian

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "compat32"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p11",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p7",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p16",
              "status": "affected",
              "version": "14.3-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Adam Crosser, Praetorian"
        }
      ],
      "datePublic": "2026-06-30T20:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The compat32 kevent() handler translates a 64-bit kevent struct into a stack- declared 32-bit struct.  It did not first zero the stack struct.\n\nAn unprivileged user may observe a small amount of uninitialized kernel stack data, which may contain sensitive information."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-908",
              "description": "CWE-908: Use of Uninitialized Resource",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:11:21.113Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:48.compat32.asc"
        }
      ],
      "title": "Kernel stack disclosure in 32-bit compatibility support",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-49425",
    "datePublished": "2026-08-19T07:11:21.113Z",
    "dateReserved": "2026-05-29T20:24:28.616Z",
    "dateUpdated": "2026-08-19T07:11:21.113Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-49424 (GCVE-0-2026-49424)

Vulnerability from cvelistv5 – Published: 2026-08-19 07:08 – Updated: 2026-08-19 07:08

Title

Kernel stack disclosure in Linux compatibility layer

Summary

The Linux waitid() implementation translates a FreeBSD siginfo_t struct into a stack-declared Linux siginfo_t. It did not first zero the stack struct. An unprivileged user may observe 104 bytes of uninitialized kernel stack data, which may contain sensitive information.

Severity

No CVSS data available.

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Adam Crosser, Praetorian

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "linux"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p11",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p7",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p16",
              "status": "affected",
              "version": "14.3-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Adam Crosser, Praetorian"
        }
      ],
      "datePublic": "2026-06-30T20:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The Linux waitid() implementation translates a FreeBSD siginfo_t struct into a stack-declared Linux siginfo_t.  It did not first zero the stack struct.\n\nAn unprivileged user may observe 104 bytes of uninitialized kernel stack data, which may contain sensitive information."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-908",
              "description": "CWE-908: Use of Uninitialized Resource",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:08:35.691Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:47.linux.asc"
        }
      ],
      "title": "Kernel stack disclosure in Linux compatibility layer",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-49424",
    "datePublished": "2026-08-19T07:08:35.691Z",
    "dateReserved": "2026-05-29T20:24:28.616Z",
    "dateUpdated": "2026-08-19T07:08:35.691Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-49423 (GCVE-0-2026-49423)

Vulnerability from cvelistv5 – Published: 2026-08-19 07:01 – Updated: 2026-08-19 07:01

Title

Remote DOS via uninitialized memory access in KTLS receive

Summary

When building the iovec array for a received TLS 1.2 CBC record, ktls_ocf_tls_cbc_decrypt() incremented the iovec index for every mbuf in the chain, including mbufs that were skipped because they contained only TLS header bytes. This left uninitialized entries in the iovec array. The iovec array was allocated without zeroing. A remote TLS peer can cause the kernel to read from uninitialized iovec entries during HMAC computation, resulting in a kernel panic. The peer must be able to control TCP segmentation such that the first mbuf of a CBC record contains only the 5-byte TLS record header.

Severity

No CVSS data available.

CWE

CWE-908 - Use of Uninitialized Resource

Assigner

freebsd mitre root

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.1-RELEASE , < p1 (release) Affected: 15.0-RELEASE , < p11 (release) Affected: 14.4-RELEASE , < p7 (release) Affected: 14.3-RELEASE , < p16 (release)

Date Public

2026-06-30 20:00

Credits

Yuxiang Yang, Yizhou Zhao, Ao Wang, Xuewei Feng, Qi Li, and Ke Xu from Tsinghua University using GLM-5.1 from Z.ai

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "modules": [
            "ktls"
          ],
          "product": "FreeBSD",
          "vendor": "FreeBSD",
          "versions": [
            {
              "lessThan": "p1",
              "status": "affected",
              "version": "15.1-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p11",
              "status": "affected",
              "version": "15.0-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p7",
              "status": "affected",
              "version": "14.4-RELEASE",
              "versionType": "release"
            },
            {
              "lessThan": "p16",
              "status": "affected",
              "version": "14.3-RELEASE",
              "versionType": "release"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Yuxiang Yang, Yizhou Zhao, Ao Wang, Xuewei Feng, Qi Li, and Ke Xu from Tsinghua University using GLM-5.1 from Z.ai"
        }
      ],
      "datePublic": "2026-06-30T20:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "When building the iovec array for a received TLS 1.2 CBC record, ktls_ocf_tls_cbc_decrypt() incremented the iovec index for every mbuf in the chain, including mbufs that were skipped because they contained only TLS header bytes.  This left uninitialized entries in the iovec array.  The iovec array was allocated without zeroing.\n\nA remote TLS peer can cause the kernel to read from uninitialized iovec entries during HMAC computation, resulting in a kernel panic.  The peer must be able to control TCP segmentation such that the first mbuf of a CBC record contains only the 5-byte TLS record header."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-908",
              "description": "CWE-908: Use of Uninitialized Resource",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T07:01:49.801Z",
        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
        "shortName": "freebsd"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:46.ktls.asc"
        }
      ],
      "title": "Remote DOS via uninitialized memory access in KTLS receive",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
    "assignerShortName": "freebsd",
    "cveId": "CVE-2026-49423",
    "datePublished": "2026-08-19T07:01:49.801Z",
    "dateReserved": "2026-05-29T20:24:28.616Z",
    "dateUpdated": "2026-08-19T07:01:49.801Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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1555 vulnerabilities by FreeBSD

CVE-2026-58088 (GCVE-0-2026-58088)

CVE-2026-58087 (GCVE-0-2026-58087)

CVE-2026-58086 (GCVE-0-2026-58086)

CVE-2026-58085 (GCVE-0-2026-58085)

CVE-2026-58084 (GCVE-0-2026-58084)

CVE-2026-58083 (GCVE-0-2026-58083)

CVE-2026-58082 (GCVE-0-2026-58082)

CVE-2026-58081 (GCVE-0-2026-58081)

CVE-2026-49425 (GCVE-0-2026-49425)

CVE-2026-49424 (GCVE-0-2026-49424)

CVE-2026-49423 (GCVE-0-2026-49423)

CVE-2026-49431 (GCVE-0-2026-49431)

CVE-2026-49430 (GCVE-0-2026-49430)

CVE-2026-49429 (GCVE-0-2026-49429)

CVE-2026-49428 (GCVE-0-2026-49428)

CVE-2026-49427 (GCVE-0-2026-49427)

CVE-2026-49426 (GCVE-0-2026-49426)

CVE-2026-49422 (GCVE-0-2026-49422)

CVE-2026-49421 (GCVE-0-2026-49421)

CVE-2026-58088 (GCVE-0-2026-58088)

CVE-2026-58087 (GCVE-0-2026-58087)

CVE-2026-58086 (GCVE-0-2026-58086)

CVE-2026-58085 (GCVE-0-2026-58085)

CVE-2026-58084 (GCVE-0-2026-58084)

CVE-2026-58083 (GCVE-0-2026-58083)

CVE-2026-58082 (GCVE-0-2026-58082)

CVE-2026-58081 (GCVE-0-2026-58081)

CVE-2026-49425 (GCVE-0-2026-49425)

CVE-2026-49424 (GCVE-0-2026-49424)

CVE-2026-49423 (GCVE-0-2026-49423)

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1555 vulnerabilities by FreeBSD

CVE-2026-58088 (GCVE-0-2026-58088)

CVE-2026-58087 (GCVE-0-2026-58087)

CVE-2026-58086 (GCVE-0-2026-58086)

CVE-2026-58085 (GCVE-0-2026-58085)

CVE-2026-58084 (GCVE-0-2026-58084)

CVE-2026-58083 (GCVE-0-2026-58083)

CVE-2026-58082 (GCVE-0-2026-58082)

CVE-2026-58081 (GCVE-0-2026-58081)

CVE-2026-49425 (GCVE-0-2026-49425)

CVE-2026-49424 (GCVE-0-2026-49424)

CVE-2026-49423 (GCVE-0-2026-49423)

CVE-2026-49431 (GCVE-0-2026-49431)

CVE-2026-49430 (GCVE-0-2026-49430)

CVE-2026-49429 (GCVE-0-2026-49429)

CVE-2026-49428 (GCVE-0-2026-49428)

CVE-2026-49427 (GCVE-0-2026-49427)

CVE-2026-49426 (GCVE-0-2026-49426)

CVE-2026-49422 (GCVE-0-2026-49422)

CVE-2026-49421 (GCVE-0-2026-49421)

CVE-2026-58088 (GCVE-0-2026-58088)

CVE-2026-58087 (GCVE-0-2026-58087)

CVE-2026-58086 (GCVE-0-2026-58086)

CVE-2026-58085 (GCVE-0-2026-58085)

CVE-2026-58084 (GCVE-0-2026-58084)

CVE-2026-58083 (GCVE-0-2026-58083)

CVE-2026-58082 (GCVE-0-2026-58082)

CVE-2026-58081 (GCVE-0-2026-58081)

CVE-2026-49425 (GCVE-0-2026-49425)

CVE-2026-49424 (GCVE-0-2026-49424)

CVE-2026-49423 (GCVE-0-2026-49423)

Search criteria ⓘ Use this form to refine search results.
Full-text search supports keyword queries with ranking and filtering.
You can combine vendor, product, and sources to narrow results.
Enable “Apply ordering” to sort by date instead of relevance.